TLZ12C-GS18 Equivalent & Substitute Parts

Part Overview

The TLZ12C-GS18 is an active zener diode manufactured by Vishay General Semiconductor - Diodes Division, designed for voltage regulation and protection applications. This surface mount component operates at a nominal zener voltage of 12 V with a maximum power dissipation of 500 mW in a compact SOD-80 MiniMELF package. The part is RoHS3 compliant and carries an unlimited moisture sensitivity level rating.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining functional compatibility in the target application circuit.

Substiute Parts

TLZ12C-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1167TLZ12C-GS18 Datasheet

Current PartRFQ

1N4106UR-1

Microchip TechnologyIn Stock: 12871N4106UR-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLZ12C-GS18 is determined by the following critical parameters:

Primary Electrical Criteria:

• Nominal zener voltage of 12 V
• Maximum power dissipation of 500 mW
• Operating temperature range of -65°C to 175°C
• Surface mount configuration

Secondary Electrical Criteria:

• Reverse leakage current characteristics
• Forward voltage drop characteristics
• Impedance specifications

The substitute part 1N4106UR-1 meets the primary electrical criteria with identical nominal zener voltage, power rating, and operating temperature range. Both parts are surface mount zener diodes rated for 12 V / 500 mW applications. Differences in package designation (SOD-80 versus DO-213AA) and impedance specifications require circuit-level evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

TLZ12C-GS18 (Primary Selection): The TLZ12C-GS18 is the active, manufacturer-recommended part for new designs. This component carries RoHS3 compliance certification, meeting current environmental and regulatory requirements for commercial and industrial applications. The part is available in high inventory (1095 units) and features a lower maximum impedance specification (12 Ohms) compared to the substitute, providing superior voltage regulation characteristics in applications requiring tight load regulation.

1N4106UR-1 (Substitute Selection): The 1N4106UR-1 serves as a functional substitute when TLZ12C-GS18 availability is constrained. This part maintains electrical equivalence in nominal zener voltage and power rating. However, the 1N4106UR-1 is RoHS non-compliant and carries a ±5% zener voltage tolerance specification. The higher impedance rating (200 Ohms maximum) results in reduced voltage regulation performance under varying load conditions. Selection of this substitute requires verification that RoHS non-compliance is acceptable for the target application and that the impedance specification does not compromise circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the 1N4106UR-1 directly replace the TLZ12C-GS18 in all applications?

A: Both parts share identical nominal zener voltage (12 V) and power rating (500 mW), enabling functional substitution in voltage regulation and protection circuits. However, the 1N4106UR-1 exhibits higher impedance (200 Ohms versus 12 Ohms), which affects voltage regulation under dynamic load conditions. Applications with stringent load regulation requirements may experience performance degradation with the substitute part.

Q: What is the significance of the impedance difference between these parts?

A: Impedance (Zzt) directly influences the zener diode's ability to maintain constant voltage across varying load currents. The TLZ12C-GS18 impedance of 12 Ohms provides superior voltage stability compared to the 1N4106UR-1 at 200 Ohms. In circuits with rapidly changing load conditions, the lower impedance of the primary part delivers better transient response and voltage regulation accuracy.

Q: Are the package designations DO-213AC and DO-213AA interchangeable?

A: DO-213AC (SOD-80 MiniMELF) and DO-213AA are distinct surface mount package formats with different physical dimensions and land pattern requirements. PCB layout and component placement equipment must be verified for compatibility with the specific package type. Direct mechanical substitution without PCB redesign is not possible between these package formats.

Q: What compliance considerations apply to the substitute part?

A: The TLZ12C-GS18 is RoHS3 compliant, meeting current environmental directives for restricted substances. The 1N4106UR-1 is RoHS non-compliant. Applications subject to RoHS compliance requirements must use the TLZ12C-GS18 or identify alternative compliant substitutes. REACH status is unaffected for both parts.

Q: How do the reverse leakage current specifications compare?

A: The TLZ12C-GS18 specifies 40 nA reverse leakage at 11.2 V, while the 1N4106UR-1 specifies 50 nA at 9.2 V. These measurements are taken at different reverse voltage conditions, making direct comparison complex. Applications requiring minimal leakage current in high-impedance circuits should evaluate both specifications against circuit requirements.

Q: What is the significance of the zener voltage tolerance specification?

A: The TLZ12C-GS18 does not specify a tolerance value in the provided data, while the 1N4106UR-1 carries a ±5% tolerance. This tolerance defines the acceptable variation in actual zener voltage from the nominal 12 V specification. Applications requiring tighter voltage regulation should confirm tolerance specifications with the component manufacturer or datasheet documentation.